Structure of (SiEt 3 ) 2 (B 12 F 12 ). Another example of R 3 Si F E bridge bonding (E=B, Al, Si)

The isolation and structure of (SiEt3)2(B12F12) is reported. Statistically significant BF bond lengthening due to coordination of B12F122− to a cation has been observed for the first time.